Looks like all of Scotland moves to Level 3 from tomorrow. The same restrictions on movement will continue with the reasonable excuse of leaving your area for exercise/recreation provided you do not have an overnight stay.
IMPORTANT MODERATOR LEGAL NOTE: The above is false information. The law allows you to move around the whole of Scotland - as well as between Scotland and the other UK nations - for any purpose, including with overnight stays. See this post.
Interestingly, people from other parts of the UK are permitted to travel to and remain in Level 3 areas. So people from England & Wales can holiday anywhere in Scotland, but people from Scotland are restricted to their own local areas.
14.—(1) A person who does not live in a Level 3 area must not enter or remain in that area.
(2) But a person who does not live in a Level 3 area may—
(a)travel through it in order to reach a place outwith the area,
(b)enter or remain in a Level 3 area, if entry to the Level 3 area is from—
(iv)the Bailiwick of Guernsey,
(v)the Bailiwick of Jersey,
(vi)the Isle of Man.